When your bottom bracket is toast, it's time for a new one. It's as simple as that. Shimano's 5700 series 105 BB will fit any of their Hollowtech II road cranks. This particular BB is for double cranks only. It won't work with triples. The threading is English.

Showing Questions 1 of 1

Q: I've got an old Raleigh road bike with the original 105 bio-pace chain ring and group. Looks like I need to replace my BB, will this one work? The bike IS 28 years old so need to check first. Thanks

A: This BB is recommended for 24mm Shimano spindle and would work with most modern road cranks with the listed specifications.

Very Good For The Price, No Slop - Nov 29, 2014

5 out of 5 stars

Rowan F.

Seattle, WA

I have to give this a five stars. Albeit not a ceramic bearing unit, its still darn good for $30. I ride this on a 2008 Trance X2 that I have upgraded quite a bit. I still have to get the spacers figured out, my ride XC cranks (not so good) have a little slop side to side. With the weather we get in Seattle, the rain kills bottom brackets pretty fast. It's a new one every year for riders like me, and I find this one superior to my last Race Face bottom bracket.

Decent enough - Apr 24, 2014

5 out of 5 stars

FRED R.

FORT WAYNE, IN

I have this on a road bike so it should last longer than on a CX bike, and if it doesn't for the money it's really inexpensive to replace, it does feel very smooth in use. I think 105 is the sweet spot in the Shimano line, it lasts a very long time, it doesn't cost much, and the weight is reasonable.

Nice, especially for the cost - Apr 16, 2014

5 out of 5 stars

Anonymous

Alma, MI

External bottom brackets don't seem to last nearly a long as the old internal-style octalink and square taper units, but the good news is that the cost is pretty low too. The 105 level is as high as I'll go on my 'cx bikes, because these don't last more than one full 'cx season anyway.